A collection of SQL scripts I wrote while practising advanced querying techniques — including multi-table JOINs, subqueries, GROUP BY analysis, and data aggregation patterns.
HR Data Dashboard
Created an Excel dashboard to visualise workforce data for a fictional company — salary distribution, age groups, department breakdown, and engagement indicators.
Sales Performance Dashboard
Built a dynamic Excel dashboard to track 4 years of sales data — covering revenue trends, top products, and regional performance. Used Pivot Tables, charts, and formulas to make it fully interactive.
World Happiness Report Analysis
University homework project where I explored what factors most influence happiness scores across 156 countries. Covered correlation analysis, distribution checks, and basic predictive modelling.
Deutsche Bahn Delay Analysis
University group project analysing 1.9 million train records. I handled the statistical part — comparing delay patterns across train types using ANOVA and descriptive analysis.
Customer Churn Prediction
Built a machine learning project on 72,000+ ISP customer records to predict churn. Compared 6 classification models — Random Forest performed best at 93% accuracy. Done as a self-learning project on Kaggle.